package com.ypj.community.controller.interceptor;

import com.ypj.community.domain.LoginTicket;
import com.ypj.community.domain.User;
import com.ypj.community.service.UserService;
import com.ypj.community.util.CookieUtil;
import com.ypj.community.util.HostHolder;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.core.context.SecurityContextImpl;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.Date;

@Component
public class LoginTicketInterceptor implements HandlerInterceptor {

    @Autowired
    private UserService userService;
    @Autowired
     private HostHolder hostHolder;
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //获取cookie中凭证
        String ticket= CookieUtil.getValue(request,"ticket");
        if (ticket!=null){
            //查询凭证
            LoginTicket loginTicket=userService.findLoginTicket(ticket);
            //判断凭证是否有效
            if (ticket!=null&&loginTicket.getStatus()==0&&loginTicket.getExpired().after(new Date())){
                //根据凭证查询用户
                User user=userService.findUserById(loginTicket.getUserId());
                //在本次请求中持有用户
                hostHolder.setUsers(user);
                //构建用户认证的结果，并存入SecurityContext,以便于Security进行授权
                Authentication authentication=new UsernamePasswordAuthenticationToken(user,user.getPassword(),
                        userService.getAuthorities(user.getId()));
                SecurityContextHolder.setContext(new SecurityContextImpl(authentication));
            }
        }
        return true;
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        User user=hostHolder.getUser();
        if (user!=null&&modelAndView !=null){
            modelAndView.addObject("loginUser",user);
        }
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        hostHolder.clear();
        SecurityContextHolder.clearContext();
    }
}
